We look at the division of 98292734 by 645 
The aim is to understand the frequency of 645 in 98292734.

Advancing to step 1:
The number 645 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 645

On to step 2:
The number 645 fits into 98 0 times, leaving a remainder of 98.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 98 to get 98.
Take the next digit (2) from the dividend and append it to 98, then repeat: 982 / 645

Moving on to step 3:
982 divided by 645 is 1 with a remainder of 337.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 645 from 982, we get 337.
Grab the next digit (9) from the dividend, add it to 337, then carry on: 3379 / 645

Step 4:
645 can be fit into 3379 5 times, resulting in a remainder of 154.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Deduct 3225 from 3379 and we're left with 154.
Include the next digit (2) from the dividend after 154, then repeat: 1542 / 645

Let's proceed to step 5:
645 can be fit into 1542 2 times, resulting in a remainder of 252.
Put 2 as the next digit of the answer. 
Result so far: 152.0
If we take 1290 away from 1542, we end up with 252.
Include the next digit (7) from the dividend after 252, then repeat: 2527 / 645

Moving on to step 6:
645 goes into 2527 3 times with a remainder of 592.
Record the quotient 3 as the next digit in the result. 
Result so far: 1523.0
Subtract 1935 from 2527 to get 592.
Include the next digit (3) from the dividend after 592, then repeat: 5923 / 645

Advancing to step 7:
5923 divided by 645 is 9 with a remainder of 118.
Put 9 as the next digit of the answer. 
Result so far: 15239.0
The remainder is 118 after subtracting 5805 from 5923.
Grab the next digit (4) from the dividend, add it to 118, then carry on: 1184 / 645

Step 8:
1184 divided by 645 is 1 with a remainder of 539.
The number 1 becomes the next digit in our result. 
Result so far: 152391.0
If we subtract 645 from 1184, we get 539.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5390, and continue the process.

On to step 9:
645 goes into 5390 8 times with a remainder of 230.
The number 8 becomes the next digit in our result. 
Result so far: 152391.8
If we take 5160 away from 5390, we end up with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Advancing to step 10:
If we divide 2300 by 645, we get 3 and a remainder of 365.
Write down 3 as next digit of the result. 
Result so far: 152391.83
Subtract 1935 from 2300 to get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Advancing to step 11:
3650 divided by 645 is 5 with a remainder of 425.
Use 5 as the next digit of our solution. 
Result so far: 152391.835
Deduct 3225 from 3650 and we're left with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Moving on to step 12:
645 can be fit into 4250 6 times, resulting in a remainder of 380.
Use 6 as the next digit of our solution. 
Result so far: 152391.8356
If we take 3870 away from 4250, we end up with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Let's proceed to step 13:
645 goes into 3800 5 times with a remainder of 575.
Record the quotient 5 as the next digit in the result. 
Result so far: 152391.83565
Deduct 3225 from 3800 and we're left with 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Moving on to step 14:
645 can be fit into 5750 8 times, resulting in a remainder of 590.
Put 8 as the next digit of the answer. 
Result so far: 152391.835658
Deduct 5160 from 5750 and we're left with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Let's proceed to step 15:
The number 645 fits into 5900 9 times, leaving a remainder of 95.
Put 9 as the next digit of the answer. 
Result so far: 152391.8356589
The remainder is 95 after subtracting 5805 from 5900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Going ahead to step 16:
645 can be fit into 950 1 times, resulting in a remainder of 305.
Put 1 as the next digit of the answer. 
Result so far: 152391.83565891
Deduct 645 from 950 and we're left with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

The final outcome is 152391.83565891, with a leftover of 3.05e-07.